hidden tracks can just be tracks not listed on the track listing, so even cassette tapes could have them.
the beatles were probably the originators the hidden track, with some weird thing at the end of Sgt. Pepper, and hidden song at the end of Abbey Road.
Originally Posted by Nightshade
Late 80s like 88 or so
1982
h:
http://en.wikipedia.org/wiki/Compact_disc#History